Alien Vs Predator - Too Many Men in the Background
About 14 minutes into the movie when Lex is giving the crew a talk before they embark, the group is first shot from above. In this shot, there are only two men in orange standing behind her as she talks. Yet when the camera shifts to in front of her, we can see a line of drillers standing behind her that were not there when seen from above. Oops!